Pneumatic pump



Sept. 30, 1952 A. R. "HARVIE 2,612,118

PNEUMATIC PUMP Filed Dec. :50, 1949 Patented Sept. 30,. 1952 BN UM TIQBUMB I Al'exand'enlt; Harvie, orillia; omario. census Applicatipn necember 30, 1.949, Serial Nor-135.893;

1'- Claims. (cums-248) This invention relates to-improvementsin a pneumatic pump v for. supplying, water, from. a

wellftank or cistern, under pressure. as. to. a faucet.

An object of the inventionis. tqprovide, an.

apparatus for, lifting. liquid under pressure from a source. of. supply. that is automatic and a self regulating, requiring, the; minimum, of attention.

Afurther objectof the invention. is. to proide. a pneumatic. pu mp consisting .of a chamber, immersedlina watersuppl'y, to and. from which compressed} air is intermittently admitted and bled by a nove1..fioat operateclf control valve of improved structure and reliable. hen-stalling, rap1di act Qn-- A 7 further obj ect. of. the. invention is r the. provision of a compressed air operated pneumatic pump of the nature. and for the .purposedescribed that is characterized bystructural simplicity havingbut few working, parts; is durable and designed to. ive long trouble-freeservice; compact and easy to. install; andcapable .ofmanufacture and operation at reasonable,cost,; whereby. the same. is rendered coxnmereialhcv desirable.

To. the accomplishment .ofl these, and related objects as shall become apparentas,thedescription proceeds, the invention resides in thereonstruction combination and, arrangement. of parts shall be hereinafter, more. fully described, illustrated I in the accompanying. drawing,- and pointed out in .the' claims, hereunto appended.

' Theinvention will; behestunderstoodand can.

In the. drawing the pump .chamber in vertical section is. shown I immersed ima. tank .of water,

the remaining parts .of the .pump appearing in.

elevation;

The pump chambered casing I is of cylindrical or oval form, with a closed bottom 2, and an open top 3 provided with a removable water-tight cap or cover 4. Installediin ahwater'tank, well or cistern such as shown at B it 'is immersed in the water or other liquid so as to.--be-.at; alltimes covered by the liquid.

To a pipe or nipple Ii threaded in a central bore I through the bottom 2 as..-T--fitting 8 connects that; has a screened.inletipiperalon one' branch and; an: outlet supply pipe: lllwreachingt to a faucet I I orthelike. on the zother branchr Be- WQQ theycreened intake. 9 .zand'the T' thereais a., one way; holdinginlet valved-I 2 and between their and thefaucet I I. .there is another one-May outlet valved 3,- .If. the. pressure 'in the -b'ase of the reservoir 5 be greater than in the chamber I.

the inlet. valve, I2. will open. butv if the pressure inithecha'mber I be greater. the said valvewill remain closed. Simil'arly,.if"the pressure in .the chamber exceeds the normali atmospheric pres.- sure togetherv withrtheweight; of the. column in the supply pipe l'ilito. thefaucet. lljthe. outlet valve I I 3- will open I when the faucet. I I! is. turned on and close, as ,a holding. or. check valve. when the faucet is turned ofl.

The pump meohanismcomprises essentiallyan airline or inlet pipe I4 in communication. with. any; desired constantisuppl'yv. of air, pressure,,.not shown, preferably entering; the chamber I through, the cover .plate Mandi an, automatic. .air. bleed. tube I 5. likewise.. extending throughv the cover; Thus in removing, the cover, :not' only. is the interior of. the. chamber accessiblebutall the, pump mechanism, savepnly the. two regular plumbing. valves I2.:and',.I3',-..comes withit for easy adjustment, replacement or; repair.

Specifically, the air bleed with.its..associated fioat-operatedvsleeve valveis .the heart ofthe pump. The tube I5 passing through the cover in air-tight connection may beverticallyadjusted by means of the nuts IB threaded on thetube and engagingopposite faces of. the.cover.. The .upper or exterior end. oflthe tub'e...reaches above. .the water. level. and has an. outlet ,openihgtherein; the lower .or innerend extending. welliintothe. chamber-is closedat the bottom but has a lateral port I'I spaced 1 some distance... thereabove... Mounted concentrieally 0n the tube I 5''. andv nor,- lvs spended below .the;ai1:;b1eed"jport I'Tis a; sleeve valve I8 being movableup .the tube, to coverzand close the said port; Apairiofjspaced rods I I! extend from opposite sides of said. sleeve valve at "itsjlower. end carrying a .cross piiece 20; at a distance beyond reach ofjthe bottomofj'the tube I5,"fr0m which a longfi'oat stem 2I' drops.

Movable along this stem'fromits headed-bottom valve 1 I 8 up its' tube until 'iticleses the port II;

when airpressure builds up to the predetermined point along the inletvalve I 2 and providingzja pressure supply of water at the faucet I I; obviate the possibilitymf' the valverjustpartially clesing thepor t and" allowing enough-"pressure to escape to produce a balance so that the device.

that restrains the valve just before closing and/ or opening and then accelerates its travel across the port in either direction. A suitable valve flipper is shown consisting of a centrally bored valve-influencing member 23 threaded on the tube above the port II and vertically adjustable on the tube by 'a pair of nuts 24 to assure its exact setting. Opposite ends of this saddle like member depend as spaced diagonally opposite spring arms 25 to approximately the level of the lateral port. Links 26, longer than the direct radial distance from the sleeve valve 18 to these arms, are pivotally connected at opposite ends to the bottom of the spring arms 25 and the valve I8 near the top. Thus when the float 22 rises to the top of its stem and is exerting pressure against the valve substructure, the spring tension of the arms 25 temporarily resiststhe upward thrush of the valve until with the water rising high on the float sufficient force is exerted to spread the arms and snap the valve quickly past the port. Similarly, on the falling of the water level in the chamber, the valve does not.open the port until the float is left nearly high and dry and then the valve is likewise snapped quickly by the bleed port.

From the foregoing description taken inconnection with the accompanying drawings, it will be manifest that a pneumatic pump isprovided that will fulfill all the necessary requirements of such a device, but as many changes could be made in the above description and many apparently widely different embodiments of the invention may be constructed within the scope of the appended claims, without departing from the spirit or scope thereof, itis intended that all matters contained in the said accompanying specification and drawing shall be interpreted as illustrative and not in a limitative or restrictive sense.

Having thus described" the invention, what is claimed as new is: 1. A pneumatic pump for immersion in a body of liquid comprising a chambered casing, a pipe in communication therewith and extending from the bottom thereof into the immersingbody of liquid and having valved inlet and outlet arms, a pipelin'e leading into the top of said casing and in communication with a source of air pressure, a bleed pipe projecting through the top of said casing with part of the length thereof extending into the casing and closed at the bottom but provided with a lateral port and a float operated sleeve-valve mounted on said length of pipe extending into said casing and slidable over said lateral port. V

2. The combination with the structure set forth in claim 1 of means mounted onsaid bleed pipe :and connected with said valve for delaying the port closing or opening movements thereof and then acting to effect the same rapidly.

3. The combination with the structure set forth in claim 1 of spring means mounted on said bleed pipe and acting on said sleeve valve causing the same to snap quicklyover or clear of said'port- I 4. The combination with the'structure set forth in claim '1 of .a spring toggle device mounted on said bleed'pipe and connecting with said sleeve valve to impart a fast snapping action to the latter.

5.'An apparatus of the character described for raising water, and designed for immersion in ae ans 7.

a body of water, comprising a chambered casing, a pipe leading into the bottom thereof having a pair of arms one with a valved inlet within said body of water and the other arm reaching to a service pipe and having a holding check valve therein, a pipe line leading into the top of said casing from a source of air pressure, a bleed pipe projecting through the top of said casing with an opening in the exposed. 'upper end and with a length of pipe extending into the casing, closed at its lower end and provided with a lateral port, a float-operated sleeve valve mounted on said length of pipe extending into said casing and slidable over said lateral port and a flexible-type toggle mounted on' said pipe and connecting with said sleeve valve to snap the latter over or clear of said port.

6. An apparatus of the character described for raising water, and designed for immersion in a body of water, comprising a chambered casing, a pipe leading into the bottom thereof having a pair of arms'one with a valved inlet within said body of water and the other arm rearching to a service pipe and having a holding check valve therein, a removable top on said casing, a'pipe line leading into the top of said casing from a source of air pressure, a bleed pipe projecting through the top of said casing with an opening in the exposed upper end and with a length of pipe extending into the casing, closed at its lower end and provided with a lateral port, a floatoperated sleeve valve mounted on said length of pipe extending into said casing and slidable over said lateral port and a spring member vertically adjustable on said pipe and connecting with said sleeve valve to snap the latter over or clear of said port.

7. An apparatus of the character described for raising water, and designed for immersion in a body of water, comprising a chambered casing of cylindrical form and having a removable top, a pipe leading into the bottom of said cylindrical casinghaving a pair of arms one with a valved inlet within'said body of water and the other arm reaching to a service pipe and having a holding check valve therein, a pipe line leading into the top of said casing from a source of air pressure, a bleed pipe projecting through the top of said casingwith an opening in the exposed upper end andwith a length of pipe extending into the casing, closed at its lower end and provided with a lateral port, a float-operated sleeve valvemounted on said length of pipe extending into said casing and slidable over said lateral port, a 'U-shaped member vertically adjustable on length ofsaid pipe within said casing whose spaced arms are fiexibleand lie on diametrically opposite sides of said pipe and links connecting thearms thereof with said sleeve valve.

ALEXANDER R. HARVIE.

REFE ENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 2,241,765' I :Qhambers; May 13, 1941 

